基底代谢率和体温在内热进化中的脱性
在PubMed上查看摘要
概括
此摘要是机器生成的。基本代谢率 (BMR) 和体温 (Tb) 在大多数哺乳动物和鸟类中是独立的. 哺乳动物的BMR呈现出快速爆发,而Tb则在寒冷环境的影响下演变为更冷的身体.
科学领域
- 进化生物学
- 生理生态学
- 脊椎动物的进化
背景情况
- 鸟类和哺乳动物的内热对于脊椎动物的进化至关重要.
- 使用基底代谢率 (BMR) 维持体温 (Tb),Tb和BMR之间存在反循环.
- 之前认为BMR和Tb在内热辐射过程中共同演变.
研究的目的
- 在哺乳动物和鸟类中研究BMR和Tb的进化脱.
- 了解历史热环境对BMR和Tb演变的影响.
主要方法
- 哺乳动物和鸟类血统的BMR和Tb演变的基因分析.
- 检查 BMR 和 Tb 的演变趋势和变化速度.
- 将 BMR 和 Tb 的变化与环境温度的变化相关联.
主要成果
- 在~90%的哺乳动物和36%的鸟类血统中,BMR和Tb分离.
- 哺乳动物的BMR在没有方向趋势的爆发中进化; Tb以恒定的速度向更冷的身体进化.
- 鸟类的BMR以恒定的速度进化;Tb显示速度异质,并向更冷的物体进化.
- 哺乳动物的BMR变化, 增加和减少, 与环境温度降低相关.
结论
- 在鸟类和哺乳动物中,BMR和Tb的演变基本上是独立的.
- 哺乳动物和鸟类在BMR和结核病方面采取了不同的进化路径.
- 自然选择利用了哺乳动物对热挑战的BMR多样性.
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